Senior Full Stack Engineer

Fredo Technologies; Toronto; Hybrid; Confidential; Full time

Job summary

An innovative startup is seeking a Senior Full Stack Engineer to lead the development of scalable APIs and infrastructure. In this role, you'll collaborate closely with the CTO and product team, focusing primarily on backend development while occasionally supporting front-end delivery. Your expertise in AI technologies and backend languages will be crucial in building reliable systems and integrating modern AI tools. This is a fantastic opportunity to join a dynamic team where your contributions will directly impact cutting-edge projects and the overall success of the company.

Benefits

Flexible Work Hours

Remote / Hybrid Work Options

Vacation Days / Paid Time Off (PTO)

Generous salary

Flexible time off program

Qualifications

• 5+ years as a full stack or backend engineer with strong backend focus.
• Experience with AI technologies and backend languages like Node.js and Python.

Responsibilities

• Design and maintain backend services, APIs, and infrastructure.
• Collaborate on AI-powered features and optimize system performance.

Skills

Node.js

Python

Go

Java

TypeScript

AI technologies (OpenAI, Hugging Face)

RESTful APIs

SQL

NoSQL

Backend architecture

Job description

About Us

Fredo specializes in software talent for private equity and venture capital-backed startups. We help clients scale efficiently by securing the right engineers, product leaders, and go-to-market experts—fast."

Note: This job description has been posted on behalf of our client.

Role Description

Our client, a fast-growing VC-backed startup, is looking for a Senior Full Stack Engineer with a strong backend focus. You'll lead the development of scalable APIs and infrastructure while collaborating on AI-powered features. This role involves working closely with the CTO and product team to build reliable systems and integrate modern AI tools. While primarily backend, you’ll occasionally support front-end delivery to ensure seamless functionality across the stack.

Tasks

• Design, build, and maintain backend services, APIs, and infrastructure
• Develop scalable, secure systems to support AI-powered product features
• Integrate AI technologies such as LLMs, vector databases, and third-party APIs
• Collaborate with product and design teams to define technical requirements and solutions
• Occasionally support front-end development to ensure full feature delivery
• Optimize system performance, reliability, and maintainability

Requirements

• 5+ years of experience as a full stack or backend engineer
• 1+ year of experience working with AI technologies (e.g., OpenAI, Hugging Face, custom ML models)
• Strong backend experience with multiple languages such as Node.js, Python, Go, or Java
• Proficiency in TypeScript for backend or shared codebases
• Experience designing and consuming RESTful APIs and working with SQL and NoSQL databases
• Solid understanding of backend architecture, scalability, and system design
• Familiarity with front-end frameworks (React, Next.js) is a plus but not required

**
Preferred Experience**

• Previous experience at an early-stage or venture-backed startup
• Hands-on work with AI toolchains and frameworks in production environments
• Agile team experience
• Contributions to open-source projects or engineering communities

Benefits

• Flexible Work Hours
• Remote / Hybrid Work Options
• Vacation Days / Paid Time Off (PTO)
• Generous salary
• Flexible time off program

We’re committed to building a team where everyone feels welcome. At Fredo, we believe that diverse backgrounds and perspectives make us stronger. We encourage people of all identities, experiences, and communities to apply. What matters most to us is your talent, your attitude, and your willingness to grow with us.

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